package reflect;

import reflect.annotations.AutoRunClass;
import reflect.annotations.AutoRunMethod;

import java.io.File;
import java.lang.reflect.Method;

/**
 * 调用与当前类Test6在同一个包中被注解@AutoRunClass标注的类中那些被注解@AutoRunMethod标注的方法若干次(次数由该方法注解的参数确定)
 */
public class Test6 {
    public static void main(String[] args) throws Exception {
        //1
        File dir = new File(Test6.class.getResource(".").toURI());
        String packageName = Test6.class.getPackage().getName();
        //2
        File[] subs = dir.listFiles(f->f.getName().endsWith(".class"));
        for(File sub : subs) {
            String fileName = sub.getName();
            String className = fileName.substring(0, fileName.indexOf("."));
            //3
            Class cls = Class.forName(packageName + "." + className);
            //4根据类对象判断该类是否被注解@AutoRunClass标注了
            if(cls.isAnnotationPresent(AutoRunClass.class)) {
                System.out.println(className + ":被标注了");
                //5
                Object obj = cls.newInstance();//实例化该对象
                //6
                Method[] methods = cls.getDeclaredMethods();
                for(Method method : methods){
                    //7
                    if(method.isAnnotationPresent(AutoRunMethod.class)){
                        System.out.println(method.getName()+":被标注了");
                        //通过方法对象获取在该方法上的注解@AutoRunMethod
                        AutoRunMethod arm = method.getAnnotation(AutoRunMethod.class);
                        int value = arm.value();//获取该注解的参数
                        System.out.println("开始调用"+method.getName()+"()方法"+value+"次");
                        for(int i=0;i<value;i++) {
                            method.invoke(obj);
                        }
                    }
                }
            }

        }
    }
}
